1. Tardigrade
  2. Question
  3. Physics
  4. Heat is given to an ideal gas in an isothermal process. A. Internal energy of the gas will decrease. B. Internal energy of the gas will increase. C. Internal energy of the gas will not change. D. The gas will do positive work. E. The gas will do negative work. Choose the correct answer from the options given below:

Question Error Report

Thank you for reporting, we will resolve it shortly

Back to Question

Q. Heat is given to an ideal gas in an isothermal process.
A. Internal energy of the gas will decrease.
B. Internal energy of the gas will increase.
C. Internal energy of the gas will not change.
D. The gas will do positive work.
E. The gas will do negative work.
Choose the correct answer from the options given below:

JEE MainJEE Main 2023Thermodynamics

Solution:

Sol. $dQ = dU + dW $
$\Rightarrow dU = nC _{ V } dT$
$dU =0 $ (for isothermal)
$\therefore U =$ constant
Also $dQ >0 $ (supplied)
Hence $d W>0$